import java.io.File;
import java.util.InputMismatchException;
import java.util.Scanner;
public class test3 {
    public static void main(String[] args) {
        File file = new File("a.txt");
        Scanner sc=null;
        double sum=0;
        int count=0;
        try {
            sc=new Scanner(file);
            sc.useDelimiter("[^0123456789.]+");
            while ((sc.hasNext())){
                try {
                    double price =sc.nextDouble();
                    count++;
                    sum=sum+price;
                    System.out.println(price);
                }
                catch (InputMismatchException exp){
                    String t=sc.next();
                }
            }
            System.out.println("平均价格："+sum/count);
        }
        catch (Exception exp){
            System.out.println(exp);
        }
    }
}